312172845 has 16 divisors (see below), whose sum is σ = 505800960. Its totient is φ = 164384064.

The previous prime is 312172841. The next prime is 312172867. The reversal of 312172845 is 548271213.

It is not a de Polignac number, because 312172845 - 2² = 312172841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312172841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130534 + ... + 132903.

It is an arithmetic number, because the mean of its divisors is an integer number (31612560).

Almost surely, 2^312172845 is an apocalyptic number.

It is an amenable number.

312172845 is a deficient number, since it is larger than the sum of its proper divisors (193628115).

312172845 is a wasteful number, since it uses less digits than its factorization.

312172845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263524.

The product of its digits is 13440, while the sum is 33.

The square root of 312172845 is about 17668.4137658138. The cubic root of 312172845 is about 678.3675120503.

The spelling of 312172845 in words is "three hundred twelve million, one hundred seventy-two thousand, eight hundred forty-five".